High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework

Dong R, Han P, Arora H, Ballabio M, Karakus M, Zhang Z, Shekhar C, Adler P, St Petkov P, Erbe A, Mannsfeld SCB, Felser C, Heine T, Bonn M, Feng X, Canovas E (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Nature Materials

Book Volume: 17

Pages Range: 1027-1032

Journal Issue: 11

DOI: 10.1038/s41563-018-0189-z

Abstract

Metal–organic frameworks (MOFs) are hybrid materials based on crystalline coordination polymers that consist of metal ions connected by organic ligands. In addition to the traditional applications in gas storage and separation or catalysis, the long-range crystalline order in MOFs, as well as the tunable coupling between the organic and inorganic constituents, has led to the recent development of electrically conductive MOFs as a new generation of electronic materials. However, to date, the nature of charge transport in the MOFs has remained elusive. Here we demonstrate, using high-frequency terahertz photoconductivity and Hall effect measurements, Drude-type band-like transport in a semiconducting, π–d conjugated porous Fe 3 (THT) 2 (NH 4 ) 3 (THT, 2,3,6,7,10,11-triphenylenehexathiol) two-dimensional MOF, with a room-temperature mobility up to ~ 220 cm 2 V –1 s –1 . The temperature-dependent conductivity reveals that this mobility represents a lower limit for the material, as mobility is limited by impurity scattering. These results illustrate the potential for high-mobility semiconducting MOFs as active materials in thin-film optoelectronic devices.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Universität Leipzig DE Germany (DE)

How to cite

APA:

Dong, R., Han, P., Arora, H., Ballabio, M., Karakus, M., Zhang, Z.,... Canovas, E. (2018). High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework. Nature Materials, 17(11), 1027-1032. https://doi.org/10.1038/s41563-018-0189-z

MLA:

Dong, Renhao, et al. "High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework." Nature Materials 17.11 (2018): 1027-1032.

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